Oil burner



May 15,1923.

1,454,980 C. W. MUMMERY OIL BURNER Filed Oct. 21 1922 -29- 4 ZZZ liq 3/ J22 W Patented May 15, 1923. i

W. MUHHERY, OF RICHMOND,

omnommn. v 1.

Application filed October 21, 1922. Serial No. seems.

T 0 all whom it may concern:

Be it'known that -I, CLYDE W. MUMMERY, a citizen of the United States, residing at Richmond, in the county of Macomb and State .of Michigan, have invented Certain new and useful Improvements in Oil Burners. of which the following is a specification.

This invention relates to burners especially adapted and intended for burning kerosene .or other hydrocarbons, and particularly to that class thereof known as wickless burners, and in which a combustible vapor is generated from the liquid fuel and consumed in 'the body of the burner, the fuel being supplied to a trough or troughs in the base'of the burner where the vapori= zation is effected.

' The present burner is characterized by a double construct-ion, having in the base a pair of concentric troughs to which the liquid fuel is supplied and from which the vapor rises into concentric combustion chambers having slotted walls through which air is admitted into said chambers from co'ncentric air passages between which t-hecombustion chambers are located. I

A further feature of the invention relates to the form and construction of the chambers so that the flame is concentrated toward the center.

A further feature of the invention relates to the details of the structure of the various parts, to the end that the air and 'vapor shall be effectively mixed in the generating and combustion chambers.

In the accompanying drawings, Fig. 1 is a top plan viewof the burner. Fig. 2 is a central vertical section. i Fig. 3 1s a llOl'lZOlltal section on the line 3-3 of Fig. 2.

Referring specifically to the drawings, the base of. the burner comprises a casting having an outer V-shaped trough '6 and an inner V-shaped trough 7, concentric with each other and arranged at the same level, the two troughs being spaced apart by connecting lugs 8. Connecting the troughs are two (or more or less) hollow pipes or passages 9 through which the fuel oil may flow from the outer trough to the inner trough, the oil bein supplied to the outer trough through an inlet pipe 10 from any suitable tank or supply. The oil will thus flow around the outer trough, and from the outer trough to the inner trough through the hollow connections or passages 9.

The outer trough is also provided with a plurality of bosses 11, of which four are shown, arranged at spaced intervals around the trough, and adapted to receive air inlet nipples 12, the holes at the lower ends of the bosses opening into the trough slightly above the bottom thereof. The purpose of o these inletsis to admit air into the trough whereit mixes with the liquid fuel to assist in the vaporization. At the center the base castin has a holej13 to admitair, and air is also a mit-ted from below through the annular space l t-between the troughs and the burner walls resting hereon. i

There are four cylindrical burner walls indicated at 15, 16, 17 and 18 which stand vertically in concentric relation, the upper edges of the troughs being machined as indicated at 19 to form seats for the lower edges of these walls. Each wall is provided with a plurality of staggered slots 20 formed by slitting or cutting the metal of which the walls are made. This cheapens the cost of mam'lfacture and gives a more )erfect supply of air to form combustion than to form circular holesor continuous slots in the burner walls. It will be noticed that this concentric construction provides a central air chamber 21, an annular combustion chamber 22, an annular air chamber 23 and an outer annular combustion chamber 2-1, together. with an outer annular air chamber 25 formed by a closed outer cylindrical wall 26 which surrounds the whole burner and which is supported by angular strips of -metal 27 which are riveted thereto and rest at their lower ends on the flange of the base casting as indicated at 28, the strips being vertically arranged so as to not obstruct the flow. This shell 26 is open at the bottom so that air cantiow up through the chamber 25.

The central air chamber 21 is closed at the topby a cap 29 fitted on the central air tube 1:). The upper edge of the perforated wall 16 is bent inwardly as indicated at 30 forming a flange which directs the flame inwardly toward the center of the burner, and similarly the walls 16, 17 18 and 26 are flanged inwardly at the top as indicated at 31, 32, 33 and 34 to concentrate or direct the air or products of combustion inwardly or toward the centers By this construction a a certain amount of air is admitted from the concentric air chambers into-the COIICQIItIIC' or annular combustion chamber, and madditionalor excess amount of air 18 delivered to approximate contact with the adjacent 'walls within.

For starting purposes the other trough is provided with a tubular boss 36 to which a pipe 37 is connected from a cut 38 into which gasoline, alcohol or other readily vaporized 'fuel may be poured, and then lighted by a match or torch in the trough to heat the same sufficiently to start generation of the main oil supplied through the inlet 10.

After starting the fuel oil will be vaporized in the troughs 6 and 7, the vaporization being assisted by air admitted through the nipples 12 and mixing with the oil, and the vapor rises through the combustion chambers 2-2 and :24; where it is consum additional air being supplied through the slots in the walls 16, 17 and 18, the excess air escaping atthe top where it mixes with the flame at the top of the burner to form a conical or concentrated flame rising at the center of the burner. The double trough construction increases the vaporization capacity'and insures a full supply of vapor under all conditions.

I claim:

1. In a burner, s aced inner and outer circular troughs, an a pair of slotted shells mounted on each trough, said shells being concentrically arranged and forming annular combustion chambers above the troughs and an intermediate annular air chamber open at the bottom, and communicating thru said slots with the combustion chambers, the upper ends of the shells being flanged inwardly at the top to direct the air and combustion products toward the center of the burner.

2. In a burner, a trough having an oil supply thereto, shells forming a combustion space over said trough, and airsupply nipples extending into the base vof the trough, the outer ends of said nipples being located above the level of the upper edges of the trough.

3. A burner comprising a base having a pair of spaced concentric troughsctherein, saidtroughs communicating with each other, a pair of perforated shells mounted-on the edges of each trough, said shells forming a combustion space over each trough and an intervening annular air chamber, the; inner.

shell being closed at the top, and said chambers being open at the top, some of the shells having inwardly projecting flanges at the top thereof to direct the air and products of combustion toward the center of the burner.

In testimony whereof, I aflix my signature 7 in the presence of two witnesses.

CLYDE W. MUMMERY. 

